html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #666666;
}

.main-canvas {
  width: 100%;
  margin: 0px;
  height: 100%;
  background: #666666;
}

.loading {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  margin: auto;
  border: 4px solid #66cc66;
  pointer-events: none;
  border-top: 4px solid #cc6666;
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 2s ease-in-out infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.mask {
  pointer-events: none;
  position: fixed;
  top:0px;
  bottom: 0px;
  right: 0px;
  left: 0px;
  background-color: #666666;
  opacity: 1.0;
}

.mask-none {
  pointer-events: none;
  position: fixed;
  top:0px;
  bottom: 0px;
  right: 0px;
  left: 0px;
  background-color: #666666;
  opacity: 0.0;
  animation: fadeOut 2s linear 1;
}

@keyframes fadeOut {
  0% {  opacity: 1.0; }
  100% {  opacity: 0.0; }
}

.loading-title {
  font-size: 30px;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  pointer-events: none;
  width: 200px;
  height: 150px;
  margin: auto;
  color: #66cc66;
  text-align: center;
}

.copyright {
  pointer-events: none;
  font-size: 20px;
  position: absolute;
  bottom: 0;
  right: 0;
  pointer-events: none;
  margin-right: 10px;
  margin-bottom: 5px;
  color: #66cc66;
  text-align: right;
}